Non-terrestrial network resource management towards 6G: Technology, development, and future challenges

In the sixth generation mobile communication (6G) system, Non-Terrestrial Networks (NTN), as a supplement to terrestrial network, can meet the requirements of wide area intelligent connection and global ubiquitous seamless access, establish intelligent connection for wide area objects, and provide intelligent services. Due to issues such as massive access, doppler shift, and limited spectrum resources in NTN, research on resource management is crucial for optimizing NTN performance. In this paper, a comprehensive survey of multi-pattern heterogeneous NTN resource management is provided. Firstly, the key technologies involved in NTN resource management is summarized. Secondly, NTN resource management is discussed from network pattern and resource pattern. The network pattern focuses on the application of different optimization methods to different network dimension communication resource management, and the resource type pattern focuses on the research and application of multi-domain resource management such as computation, cache, communication and sensing. Finally, future research directions and challenges of 6G NTN resource management are discussed.